CN205843150U - The refrigeration system of liquid refrigerant pressure before the employing constant heating power expansion valve of pressurized canister - Google Patents
The refrigeration system of liquid refrigerant pressure before the employing constant heating power expansion valve of pressurized canister Download PDFInfo
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- CN205843150U CN205843150U CN201620794440.3U CN201620794440U CN205843150U CN 205843150 U CN205843150 U CN 205843150U CN 201620794440 U CN201620794440 U CN 201620794440U CN 205843150 U CN205843150 U CN 205843150U
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- pressurized canister
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
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Abstract
The utility model discloses and a kind of use the refrigeration system of liquid refrigerant pressure before the constant heating power expansion valve of pressurized canister.This refrigeration system installs pressurized canister before expansion valve, the high temperature and high pressure gas that compressor is discharged enters pressurized canister coil pipe and carries out heat exchange with the Low temperature low pressure liquid in pressurized canister, Low temperature low pressure liquid endothermic temperature raises, partially liq endothermic gasification, in pressurized canister pressure raise, the liquid in pressurized canister gases at high pressure promote under to vaporizer feed flow.This utility model is bigger for the four seasons, round the clock variation of ambient temperature or long-term ambient temperature lower ground district will produce good energy-saving effect.
Description
Technical field
This utility model relates to the refrigeration system of liquid refrigerant pressure before a kind of constant heating power expansion valve, specifically
A kind of use the refrigeration system of liquid refrigerant pressure before the constant heating power expansion valve of pressurized canister.
Background technology
In tradition direct-expansion type refrigeration system, needing to set before and after minimum condensation temperature (or pressure) ensures expansion valve has
Enough pressure differentials, to ensure that expansion valve is to the stable feed flow of vaporizer and sufficient feed flow.When ambient temperature reduces, condensation temperature
Along with reduction, when less than when allowing minimum condensation temperature, the pressure reduction before and after expansion valve is not enough to overcome the pressure drop of expansion valve, causes
Vaporizer feed flow is not enough, or makes expansion valve regulation enter Congestion Area, it is impossible to stablize feed flow.
Reducing condensation temperature is to improve the effective means of refrigerating plant operational efficiency, and generally condensation temperature often declines
1 DEG C, the COP of refrigeration system increases 3%.The refrigerating plant used in Refrigeration industry, is required for running throughout the year, with
As a example by the air cooled condenser refrigerating plant that North China uses, summer, condensation temperature was 45 DEG C, and winter then can as little as 10 DEG C,
If the cold-producing medium that refrigerating plant uses is R22, the pressure differential before and after winter expansion valve is (evaporation temperature between 0.34～0.50Mp
Degree-10～-25) now expansion valve can not normally to vaporizer supply abundance cold-producing medium, cause evaporating temperature to reduce,
COP reduces.The measure taked at present is to be controlled by the start-stop of condenser fan, keeps higher condensation temperature, allows before expansion valve
After pressure differential be maintained in higher scope, maintain vaporizer to have the feed flow (ensure evaporating temperature constant) of abundance.This
Method raises condensation temperature mostly about 20 DEG C, causes refrigerating plant can not make full use of the relatively low advantage of ambient temperature and improves
Efficiency.For refrigerating plant, the COP when condensation temperature is equal to 10 DEG C improves 60% when can be equal to 30 DEG C than condensation temperature.
Utility model content
Conventional refrigeration is transformed by this utility model, it is provided that liquid before a kind of employing constant heating power expansion valve of pressurized canister
The refrigeration system of cryogen pressure.This refrigeration system installs pressurized canister before expansion valve, the High Temperature High Pressure gas that compressor is discharged
Body enters pressurized canister coil pipe and carries out heat exchange with the Low temperature low pressure liquid in pressurized canister, and Low temperature low pressure liquid endothermic temperature raises, portion
Separatory body endothermic gasification, in pressurized canister pressure raise, the liquid in pressurized canister gases at high pressure promote under to vaporizer feed flow.
The refrigeration system of liquid refrigerant pressure before the employing constant heating power expansion valve of pressurized canister, including refrigeration compressor 1, system
The exhaust side of cold compressor respectively with the entrance point of stop valve 6, add the entrance point of pressure electromagnetic valve a and add the import of pressure electromagnetic valve b
End is connected, described in add pressure electromagnetic valve a the coil pipe entrance point of the port of export and pressurized canister A be connected, described in add pressure electromagnetic valve b's
The port of export is connected with the coil pipe entrance point of pressurized canister B, the coil outlets end of described pressurized canister A, the coil outlets end of pressurized canister B
Being connected with the entrance point of condenser 2 with the port of export of stop valve 6, the port of export of described condenser 2 enters with high-pressure reservoir 3
Mouthful end is connected, the port of export of described high-pressure reservoir 3 respectively with the entrance point of liquid supply electromagnetic valve c and entering of liquid supply electromagnetic valve d
Mouth end is connected, and the port of export of described liquid supply electromagnetic valve c is connected with the liquid-inlet end of pressurized canister A, described liquid supply electromagnetic valve d
The port of export be connected with the liquid-inlet end of pressurized canister B, the liquid outlet end of described pressurized canister A and entering of liquid outlet electromagnetic valve g
Mouth end is connected, and the liquid outlet end of described pressurized canister B is connected with the entrance point of liquid outlet electromagnetic valve h, described liquid outlet electromagnetic valve g
The port of export be connected with the entrance point of heating power expansion valve 4 with the port of export of liquid outlet electromagnetic valve h, going out of described heating power expansion valve 4
Mouth end is connected with the entrance point of vaporizer 5, and the port of export of described vaporizer 5 is connected with the suction side of refrigeration compressor 1；Institute
State the suction side of refrigeration compressor 1 to be connected with the entrance point of the entrance point of vacuum solenoid valve e and vacuum solenoid valve f, described in subtract
The port of export of pressure electromagnetic valve e is connected with the relief pipe entrance point of pressurized canister A, the port of export of described vacuum solenoid valve f and pressurization
The relief pipe entrance point of tank B is connected.
This refrigeration system has following technical effect that
1. liquid refrigerant pressure before this refrigeration system uses the constant heating power expansion valve of pressurized canister, can make full use of relatively low
Ambient temperature reduce condensation temperature, and have enough pressure differentials before and after ensureing expansion valve, it is achieved steady to vaporizer of expansion valve
Determine feed flow and sufficient feed flow, improve refrigerating plant efficiency.Bigger or the long-term environment temperature for the four seasons, round the clock variation of ambient temperature
Spend lower ground district and will produce good energy-saving effect.
2. the pressure power that adds of this refrigeration system pressurized canister comes from the exhaust gas heat of refrigeration compressor, does not consume extra energy
Amount, is effectively utilized compressor air-discharging waste heat, reaches energy-saving effect.
3. liquid refrigerant pressure before this refrigeration system uses the constant heating power expansion valve of pressurized canister, completely eliminates due to resistance
The pressure loss that power causes and the flash gas that produces, reduce compressor wasted work, improve the refrigerating efficiency of compressor.
Accompanying drawing explanation
Fig. 1 is this utility model schematic diagram.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model is described further.
The refrigeration system of liquid refrigerant pressure before the employing constant heating power expansion valve of pressurized canister, when ambient temperature is less than 25 DEG C
Time, described stop valve 6 is closed, and uses pressurized canister to improve refrigerant pressure before heating power expansion valve；When ambient temperature is increased to 25 DEG C
Time, described stop valve (6) opens, and refrigeration system is run routinely.
Before the employing constant heating power expansion valve of pressurized canister, the refrigeration system of liquid refrigerant pressure, continuous for ensureing refrigeration system
Feed flow, uses two pressurized canister: pressurized canister A and pressurized canister B, both duties are different, and one to vaporizer feed flow, a storage
Depositing refrigerant liquid, checker, a periodic transformation is once.
Before the employing constant heating power expansion valve of pressurized canister, the refrigeration system of liquid refrigerant pressure, arranges liquid level in pressurized canister A
Controller C and pressure controller E, arranges liquid level controller D and pressure controller F, above-mentioned liquid level controller and pressure in pressurized canister B
Force controller sets higher limit, lower limit.
As it is shown in figure 1, the refrigeration system of liquid refrigerant pressure before using the constant heating power expansion valve of pressurized canister, including refrigeration
Compressor 1, entrance point that the exhaust side of refrigeration compressor with the entrance point of stop valve 6, adds pressure electromagnetic valve a respectively and pressurization electromagnetism
The entrance point of valve b is connected, described in add pressure electromagnetic valve a the coil pipe entrance point of the port of export and pressurized canister A be connected, described pressurization
The port of export of electromagnetic valve b is connected with the coil pipe entrance point of pressurized canister B, the coil outlets end of described pressurized canister A, pressurized canister B
Coil outlets end is connected with the entrance point of condenser 2 with the port of export of stop valve 6, the port of export of described condenser 2 and high pressure
The entrance point of reservoir 3 is connected, the port of export of described high-pressure reservoir 3 respectively with entrance point and the feed flow of liquid supply electromagnetic valve c
The entrance point of electromagnetic valve d is connected, and the port of export of described liquid supply electromagnetic valve c is connected with the liquid-inlet end of pressurized canister A, described
The port of export of liquid supply electromagnetic valve d is connected with the liquid-inlet end of pressurized canister B, the liquid outlet end of described pressurized canister A with go out liquid
The entrance point of electromagnetic valve g is connected, and the liquid outlet end of described pressurized canister B is connected with the entrance point of liquid outlet electromagnetic valve h, described
The port of export of liquid outlet electromagnetic valve g is connected with the entrance point of heating power expansion valve 4 with the port of export of liquid outlet electromagnetic valve h, described heating power
The port of export of expansion valve 4 is connected with the entrance point of vaporizer 5, the port of export of described vaporizer 5 and the air-breathing of refrigeration compressor 1
Side is connected；The suction side of described refrigeration compressor 1 and the entrance point of vacuum solenoid valve e and the entrance point phase of vacuum solenoid valve f
Connecting, the port of export of described vacuum solenoid valve e is connected with the relief pipe entrance point of pressurized canister A, and described vacuum solenoid valve f goes out
Mouth end is connected with the relief pipe entrance point of pressurized canister B.
The refrigeration system of liquid refrigerant pressure, the liquid level of described pressurized canister A before the employing constant heating power expansion valve of pressurized canister
When arriving lower limit, the liquid level of described pressurized canister B just arrives the upper limit: described pressurized canister A add pressure electromagnetic valve a close, decompression electricity
Magnet valve e open, liquid supply electromagnetic valve c open, liquid outlet electromagnetic valve g close, described pressurized canister B add pressure electromagnetic valve b open, decompression electricity
Magnet valve f closes, liquid supply electromagnetic valve d closes, liquid outlet electromagnetic valve h opens, and the liquid in described high-pressure reservoir 3 is through liquid supply electromagnetic valve
C enters in pressurized canister A, and the liquid level of described pressurized canister A is moved from lower limit toward the upper limit, and the liquid of the most described pressurized canister B is in high pressure gas
Under body promotes, through described liquid outlet electromagnetic valve h, described heating power expansion valve 4 to vaporizer feed flow, its liquid level is moved from the upper limit toward lower limit
Dynamic, when the liquid level of described pressurized canister A arrives the upper limit, and the liquid level of described pressurized canister B is exactly in lower limit, the feed flow knot in a cycle
Bundle.The duty of described pressurized canister A and described pressurized canister B is exchanged: the liquid level of described pressurized canister A just arrives the upper limit, described
The liquid level of pressurized canister B just arrives lower limit, described pressurized canister A add pressure electromagnetic valve a close, vacuum solenoid valve e close, feed flow electricity
Magnet valve c close, liquid outlet electromagnetic valve g open, described pressurized canister B add pressure electromagnetic valve b close, vacuum solenoid valve f open, feed flow electricity
Magnet valve d opens, liquid outlet electromagnetic valve h closes, and the liquid of described high-pressure reservoir 3 enters in pressurized canister B through liquid supply electromagnetic valve d, described
The liquid level of pressurized canister B is moved from lower limit toward the upper limit, and the liquid of the most described pressurized canister A, under gases at high pressure promote, goes out described in warp
Liquid electromagnetic valve g, described heating power expansion valve 4 are to vaporizer feed flow, and its liquid level is moved from the upper limit toward lower limit.
The refrigeration system of liquid refrigerant pressure before the employing constant heating power expansion valve of pressurized canister, in pressurized canister, pressure is raised to pressure
During force controller higher limit, heating electromagnetic valve cuts out；When in pressurized canister, pressure drops to pressure controller lower limit, vacuum solenoid valve
Close.
Before the employing constant heating power expansion valve of pressurized canister, the operation principle of the refrigeration system of liquid refrigerant pressure is as follows: described
When the liquid level of pressurized canister A arrives lower limit, the liquid level of described pressurized canister B is exactly in the upper limit: the height that described refrigeration compressor 1 is discharged
Add pressure electromagnetic valve b described in temperature gases at high pressure warp and enter in described pressurized canister B coil pipe, with the low-temp low-pressure system in described pressurized canister B
Cryogen liquid carries out heat exchange, and high temperature and high pressure gas exothermic temperature reduces, and enters described condenser 2 through described liquid outlet electromagnetic valve h
Middle cooling is condensed into high pressure middle temperature refrigerant liquid, enters described reservoir 3, from reservoir liquid out through described feed flow electricity
Magnet valve c is to described pressurized canister liquid A feed flow, and its liquid level is moved from lower limit toward the upper limit；Liquid bulk heat absorption in described pressurized canister B, temperature
Degree raise, partially liq gasify, in pressurized canister B, gas increases, pressure raise, the liquid of pressurized canister B gases at high pressure promote under,
Enter described heating power expansion valve 4 through described liquid outlet electromagnetic valve h, become the gas-liquid two-phase cold-producing medium of low-temp low-pressure, gas-liquid two-phase system
Cryogen enters vaporizer 5, and evaporation endothermic becomes low temperature low pressure gas, returns the suction side of refrigeration compressor 1, meanwhile, pressurized canister B
Liquid level moved from the upper limit toward lower limit.When the liquid level of described pressurized canister A arrives the upper limit, the positive benefit of liquid level of described pressurized canister B
In lower limit, the feed flow in a cycle terminates, and the duty of described pressurized canister A and described pressurized canister B is exchanged, and starts next week
Phase feed flow.
When ambient temperature is increased to 25 DEG C, it is not necessary to use liquid refrigerant pressure before the constant heating power expansion valve of pressurized canister
Power, described stop valve 6 opens, and refrigeration system is run routinely.The high temperature and high pressure gas that described refrigeration compressor 1 is discharged is through described
Stop valve 6 enters and is condensed into high pressure middle temperature refrigerant liquid in described condenser 2, enters described reservoir 3, from reservoir
Liquid out enters described heating power expansion valve 4, becomes the gas-liquid two-phase cold-producing medium of low-temp low-pressure, and gas-liquid two-phase cold-producing medium enters
Vaporizer 5, evaporation endothermic becomes low temperature low pressure gas, returns the suction side of refrigeration compressor 1.
Calculating shows, in refrigeration compressor aerofluxus, the temperature sensible heat part higher than 35 DEG C disclosure satisfy that temperature is by pressurized canister
The saturated solution of 10 DEG C is pressurized to the saturated solution of 30 DEG C.Saturated liquid cold-producing medium before the heat effect of pressurized canister forces expansion valve carries
High to 30 DEG C, the enthalpy after throttling and the enthalpy under 30 DEG C of condensation temperatures are equal, say, that refrigerating capacity does not become
Change.From the point of view of the wasted work of refrigeration compressor, owing to compression end of a period pressure is 10 DEG C of corresponding saturation pressures, corresponding to 30 DEG C
Saturation pressure differ greatly, enthalpy also differs greatly, so, wasted work has had bigger saving, and the efficiency of refrigerating plant still has
Raising by a relatively large margin.
Claims (1)
1. one kind uses the refrigeration system of liquid refrigerant pressure before the constant heating power expansion valve of pressurized canister, it is characterised in that include
Refrigeration compressor (1), entrance point that the exhaust side of refrigeration compressor with the entrance point of stop valve (6), adds pressure electromagnetic valve a respectively and
The entrance point adding pressure electromagnetic valve b is connected, described in add pressure electromagnetic valve a the coil pipe entrance point of the port of export and pressurized canister A be connected,
The coil pipe entrance point of the described port of export and pressurized canister B adding pressure electromagnetic valve b is connected, and the coil outlets end of described pressurized canister A, adds
The coil outlets end of pressure tank B is connected with the entrance point of condenser (2) with the port of export of stop valve (6), described condenser (2)
The port of export is connected with the entrance point of high-pressure reservoir (3), the port of export of described high-pressure reservoir (3) respectively with liquid supply electromagnetic valve
The entrance point of c is connected with the entrance point of liquid supply electromagnetic valve d, and the described port of export of liquid supply electromagnetic valve c enters with the liquid of pressurized canister A
Mouth end is connected, and the port of export of described liquid supply electromagnetic valve d is connected with the liquid-inlet end of pressurized canister B, the liquid of described pressurized canister A
The body port of export is connected with the entrance point of liquid outlet electromagnetic valve g, the liquid outlet end of described pressurized canister B and entering of liquid outlet electromagnetic valve h
Mouth end is connected, the port of export of described liquid outlet electromagnetic valve g and the port of export of liquid outlet electromagnetic valve h and the import of heating power expansion valve (4)
End is connected, and the port of export of described heating power expansion valve (4) is connected with the entrance point of vaporizer (5), going out of described vaporizer (5)
Mouth end is connected with the suction side of refrigeration compressor (1)；The suction side of described refrigeration compressor (1) is entered with vacuum solenoid valve e's
Mouth end is connected with the entrance point of vacuum solenoid valve f, the port of export of described vacuum solenoid valve e and the relief pipe import of pressurized canister A
End is connected, and the port of export of described vacuum solenoid valve f is connected with the relief pipe entrance point of pressurized canister B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620794440.3U CN205843150U (en) | 2016-07-22 | 2016-07-22 | The refrigeration system of liquid refrigerant pressure before the employing constant heating power expansion valve of pressurized canister |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620794440.3U CN205843150U (en) | 2016-07-22 | 2016-07-22 | The refrigeration system of liquid refrigerant pressure before the employing constant heating power expansion valve of pressurized canister |
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| Publication Number | Publication Date |
|---|---|
| CN205843150U true CN205843150U (en) | 2016-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620794440.3U Withdrawn - After Issue CN205843150U (en) | 2016-07-22 | 2016-07-22 | The refrigeration system of liquid refrigerant pressure before the employing constant heating power expansion valve of pressurized canister |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106052213A (en) * | 2016-07-22 | 2016-10-26 | 天津商业大学 | Refrigerating system adopting pressurizing tank to keep pressure of liquid refrigerant in front of thermostatic expansion valve constant |
-
2016
- 2016-07-22 CN CN201620794440.3U patent/CN205843150U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106052213A (en) * | 2016-07-22 | 2016-10-26 | 天津商业大学 | Refrigerating system adopting pressurizing tank to keep pressure of liquid refrigerant in front of thermostatic expansion valve constant |
| CN106052213B (en) * | 2016-07-22 | 2018-06-22 | 天津商业大学 | Using the refrigeration system of liquid refrigerant pressure before the constant heating power expansion valve of pressurized canister |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161228 Effective date of abandoning: 20180622 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20161228 Effective date of abandoning: 20180622 |